Can Ducks Eat Chicken Feed? Mostly, With One Fix

Keeping ducks and chickens together is common, and the feed question that follows is genuinely simple with one real exception worth knowing before you free-feed a mixed flock.

Why niacin is the exception

Chicken feed is formulated around chicken physiology, and adult chickens need less dietary niacin than ducks do. Adult ducks on straight chicken layer feed generally do fine, but growing ducklings raised on chick starter calibrated for chickens are at real risk of niacin deficiency, which shows up as leg weakness and poor bone development — a much bigger problem in a fast-growing duckling than in a chick.

The fix is straightforward: add brewer’s yeast, a cheap and widely available supplement, mixed into feed or offered on the side. It closes the gap reliably for both adult ducks and growing ducklings sharing a chicken-formulated diet.

Keeping the two together generally

Ducks and chickens can share a run without difficulty in most respects, though ducks are messier with water — they need a container deep enough to dunk their whole head, which chickens do not require and which can turn bedding damp fast if it is not managed separately. That is a housing question rather than a feed one, and worth planning for if a mixed flock is the goal.

If you are still deciding whether keeping any backyard poultry is right for your situation — space, cost, local rules — what keeping backyard chickens actually takes covers the questions that apply before either bird moves in.